I recently acquired a Ryobi biscuit jointer and purchased some Freud biscuits. They didn't fit the slots made by the biscuit jointer very well. I am aware that the biscuits are made to swell when wet, so I tried to check the fit by soaking them in water. They fit better, but it was still not what I would call a snug fit.

So I'm trying to figure out if the biscuit jointer blade is too big, or the biscuits are too thin. Or is there no standard for biscuit thickness?

Oh the biscuits are too small, not too big! Dang I was about to pass on a tip to shrink them. You can't use them wet, they must be dry (bone dry if at all possible) so soaking in water is absolutely a no-go. Bottom line you need to buy different biscuits, unless a different blade is available that will fit the Ryobi which has a narrower kerf.
– GraphusApr 8 '18 at 11:24

Are different sized biscuits all the same thickness? I know FF sized biscuits ("Face Frame") require a different blade. Are they different than 0, 10, and 20 biscuits?
– Charlie KilianMay 8 '18 at 21:59